OSXMavericksWillFeatureMajorImprovementsForMultipleDisplays

One of the major new features of OS X Mavericks is how the operating system will handle multiple displays.
When dragging windows across displays, both the menu bar and dock can easily be opened on the second display.
Users can also pan spaces independently on each of the displays. And if they have an AirPlay-connected TV, it can be used as a full-featured display, which definitely makes the Apple TV much more useful.
Craig Federighi, Apple’s senior vice president of software engineering, while doing a demo of the OS, was dragging a photo between monitors seamlessly.